Paper Plate Holders Help Me Figure This Out - Quickly - 10 Pints Fo Best Answer?

Help me figure this out - quickly - 10 pints fo best answer? - paper plate holders

OK - the radio is a game to be "secret". There is a sound - whether you can hear. are necessary to identify. Here are the key and wrong answers.

You can eat outdoors.

No metal
no plastic
No rubber
without glass
no leather
paper

not a plate of polystyrene or a bowl
Not a placemat
not the holder of the plate - paper plates, like a picnic
No water
not a court

Any ideas ???????????????